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GUACAMOLE-175: Merge move of guacd core into library.

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This commit is contained in:
James Muehlner 2017-01-24 16:38:50 -08:00
commit 5d2c9676f4
18 changed files with 525 additions and 380 deletions
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2
Makefile.am
View File

@ -22,6 +22,7 @@ ACLOCAL_AMFLAGS = -I m4
# Subprojects
DIST_SUBDIRS = \
src/libguac \
src/libguacd \
src/common \
src/common-ssh \
src/terminal \
@ -36,6 +37,7 @@ DIST_SUBDIRS = \
SUBDIRS = \
src/libguac \
src/common \
src/libguacd \
tests
if ENABLE_COMMON_SSH

5
configure.ac
View File

@ -119,6 +119,10 @@ AC_SUBST([LIBGUAC_INCLUDE], '-I$(top_srcdir)/src/libguac')
AC_SUBST([COMMON_LTLIB], '$(top_builddir)/src/common/libguac_common.la')
AC_SUBST([COMMON_INCLUDE], '-I$(top_srcdir)/src/common')
# Common utility library for guacd implementations
AC_SUBST([LIBGUACD_LTLIB], '$(top_builddir)/src/libguacd/libguacd.la')
AC_SUBST([LIBGUACD_INCLUDE], '-I$(top_srcdir)/src/libguacd')
# Common base SSH client
AC_SUBST([COMMON_SSH_LTLIB], '$(top_builddir)/src/common-ssh/libguac_common_ssh.la')
AC_SUBST([COMMON_SSH_INCLUDE], '-I$(top_srcdir)/src/common-ssh')
@ -1101,6 +1105,7 @@ AC_CONFIG_FILES([Makefile
src/common-ssh/Makefile
src/terminal/Makefile
src/libguac/Makefile
src/libguacd/Makefile
src/guacd/Makefile
src/guacenc/Makefile
src/protocols/rdp/Makefile

14
src/guacd/Makefile.am
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@ -33,8 +33,7 @@ noinst_HEADERS = \
log.h \
move-fd.h \
proc.h \
proc-map.h \
user.h
proc-map.h
guacd_SOURCES = \
conf-args.c \
@ -45,16 +44,17 @@ guacd_SOURCES = \
log.c \
move-fd.c \
proc.c \
proc-map.c \
user.c
proc-map.c
guacd_CFLAGS = \
-Werror -Wall -pedantic \
@COMMON_INCLUDE@ \
@LIBGUACD_INCLUDE@ \
@LIBGUAC_INCLUDE@
guacd_LDADD = \
@COMMON_LTLIB@ \
@LIBGUACD_LTLIB@ \
@LIBGUAC_LTLIB@
guacd_LDFLAGS = \
@ -68,12 +68,6 @@ EXTRA_DIST = \
CLEANFILES = $(init_SCRIPTS)
# SSL support
if ENABLE_SSL
noinst_HEADERS += socket-ssl.h
guacd_SOURCES += socket-ssl.c
endif
# Init script
if ENABLE_INIT
initdir = @init_dir@

4
src/guacd/connection.c
View File

@ -22,9 +22,9 @@
#include "connection.h"
#include "log.h"
#include "move-fd.h"
#include "libguacd/user.h"
#include "proc.h"
#include "proc-map.h"
#include "user.h"
#include <guacamole/client.h>
#include <guacamole/error.h>
@ -36,7 +36,7 @@
#ifdef ENABLE_SSL
#include <openssl/ssl.h>
#include "socket-ssl.h"
#include "libguacd/socket-ssl.h"
#endif
#include <errno.h>

2
src/guacd/daemon.c
View File

@ -22,9 +22,9 @@
#include "connection.h"
#include "conf-args.h"
#include "conf-file.h"
#include "libguacd/user.h"
#include "log.h"
#include "proc-map.h"
#include "user.h"
#ifdef ENABLE_SSL
#include <openssl/ssl.h>

25
src/guacd/log.c
View File

@ -124,31 +124,6 @@ void guacd_log_guac_error(guac_client_log_level level, const char* message) {
}
void guacd_client_log_guac_error(guac_client* client,
guac_client_log_level level, const char* message) {
if (guac_error != GUAC_STATUS_SUCCESS) {
/* If error message provided, include in log */
if (guac_error_message != NULL)
guac_client_log(client, level, "%s: %s",
message,
guac_error_message);
/* Otherwise just log with standard status string */
else
guac_client_log(client, level, "%s: %s",
message,
guac_status_string(guac_error));
}
/* Just log message if no status code */
else
guac_client_log(client, level, "%s", message);
}
void guacd_log_handshake_failure() {
if (guac_error == GUAC_STATUS_CLOSED)

8
src/guacd/log.h
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@ -62,14 +62,6 @@ void guacd_client_log(guac_client* client, guac_client_log_level level,
*/
void guacd_log_guac_error(guac_client_log_level level, const char* message);
/**
* Prints an error message using the logging facilities of the given client,
* automatically including any information present in guac_error. This function
* accepts parameters identically to printf.
*/
void guacd_client_log_guac_error(guac_client* client,
guac_client_log_level level, const char* message);
/**
* Logs a reasonable explanatory message regarding handshake failure based on
* the current value of guac_error.

2
src/guacd/proc-map.c
View File

@ -19,9 +19,9 @@
#include "config.h"
#include "common/list.h"
#include "libguacd/user.h"
#include "proc.h"
#include "proc-map.h"
#include "user.h"
#include <guacamole/client.h>

2
src/guacd/proc-map.h
View File

@ -23,8 +23,8 @@
#include "config.h"
#include "common/list.h"
#include "libguacd/user.h"
#include "proc.h"
#include "user.h"
#include <guacamole/client.h>

212
src/guacd/proc.c
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@ -19,11 +19,11 @@
#include "config.h"
#include "libguacd/user.h"
#include "log.h"
#include "move-fd.h"
#include "proc.h"
#include "proc-map.h"
#include "user.h"
#include <guacamole/client.h>
#include <guacamole/error.h>
@ -40,216 +40,6 @@
#include <sys/types.h>
#include <sys/socket.h>
/**
* Copies the given array of mimetypes (strings) into a newly-allocated NULL-
* terminated array of strings. Both the array and the strings within the array
* are newly-allocated and must be later freed via guacd_free_mimetypes().
*
* @param mimetypes
* The array of mimetypes to copy.
*
* @param count
* The number of mimetypes in the given array.
*
* @return
* A newly-allocated, NULL-terminated array containing newly-allocated
* copies of each of the mimetypes provided in the original mimetypes
* array.
*/
static char** guacd_copy_mimetypes(char** mimetypes, int count) {
int i;
/* Allocate sufficient space for NULL-terminated array of mimetypes */
char** mimetypes_copy = malloc(sizeof(char*) * (count+1));
/* Copy each provided mimetype */
for (i = 0; i < count; i++)
mimetypes_copy[i] = strdup(mimetypes[i]);
/* Terminate with NULL */
mimetypes_copy[count] = NULL;
return mimetypes_copy;
}
/**
* Frees the given array of mimetypes, including the space allocated to each
* mimetype string within the array. The provided array of mimetypes MUST have
* been allocated with guacd_copy_mimetypes().
*
* @param mimetypes
* The NULL-terminated array of mimetypes to free. This array MUST have
* been previously allocated with guacd_copy_mimetypes().
*/
static void guacd_free_mimetypes(char** mimetypes) {
char** current_mimetype = mimetypes;
/* Free all strings within NULL-terminated mimetype array */
while (*current_mimetype != NULL) {
free(*current_mimetype);
current_mimetype++;
}
/* Free the array itself, now that its contents have been freed */
free(mimetypes);
}
/**
* Handles the initial handshake of a user and all subsequent I/O. This
* function blocks until the user disconnects.
*
* @param user
* The user whose handshake and entire Guacamole protocol exchange should
* be handled.
*
* @return
* Zero if the user's Guacamole connection was successfully handled and
* the user has disconnected, or non-zero if an error prevented the user's
* connection from being handled properly.
*/
static int guacd_handle_user(guac_user* user) {
guac_socket* socket = user->socket;
guac_client* client = user->client;
/* Send args */
if (guac_protocol_send_args(socket, client->args)
|| guac_socket_flush(socket)) {
/* Log error */
guacd_log_handshake_failure();
guacd_log_guac_error(GUAC_LOG_DEBUG, "Error sending \"args\" to new user");
return 1;
}
guac_parser* parser = guac_parser_alloc();
/* Get optimal screen size */
if (guac_parser_expect(parser, socket, GUACD_USEC_TIMEOUT, "size")) {
/* Log error */
guacd_log_handshake_failure();
guacd_log_guac_error(GUAC_LOG_DEBUG, "Error reading \"size\"");
guac_parser_free(parser);
return 1;
}
/* Validate content of size instruction */
if (parser->argc < 2) {
guacd_log(GUAC_LOG_ERROR, "Received \"size\" instruction lacked required arguments.");
guac_parser_free(parser);
return 1;
}
/* Parse optimal screen dimensions from size instruction */
user->info.optimal_width = atoi(parser->argv[0]);
user->info.optimal_height = atoi(parser->argv[1]);
/* If DPI given, set the client resolution */
if (parser->argc >= 3)
user->info.optimal_resolution = atoi(parser->argv[2]);
/* Otherwise, use a safe default for rough backwards compatibility */
else
user->info.optimal_resolution = 96;
/* Get supported audio formats */
if (guac_parser_expect(parser, socket, GUACD_USEC_TIMEOUT, "audio")) {
/* Log error */
guacd_log_handshake_failure();
guacd_log_guac_error(GUAC_LOG_DEBUG, "Error reading \"audio\"");
guac_parser_free(parser);
return 1;
}
/* Store audio mimetypes */
char** audio_mimetypes = guacd_copy_mimetypes(parser->argv, parser->argc);
user->info.audio_mimetypes = (const char**) audio_mimetypes;
/* Get supported video formats */
if (guac_parser_expect(parser, socket, GUACD_USEC_TIMEOUT, "video")) {
/* Log error */
guacd_log_handshake_failure();
guacd_log_guac_error(GUAC_LOG_DEBUG, "Error reading \"video\"");
guac_parser_free(parser);
return 1;
}
/* Store video mimetypes */
char** video_mimetypes = guacd_copy_mimetypes(parser->argv, parser->argc);
user->info.video_mimetypes = (const char**) video_mimetypes;
/* Get supported image formats */
if (guac_parser_expect(parser, socket, GUACD_USEC_TIMEOUT, "image")) {
/* Log error */
guacd_log_handshake_failure();
guacd_log_guac_error(GUAC_LOG_DEBUG, "Error reading \"image\"");
guac_parser_free(parser);
return 1;
}
/* Store image mimetypes */
char** image_mimetypes = guacd_copy_mimetypes(parser->argv, parser->argc);
user->info.image_mimetypes = (const char**) image_mimetypes;
/* Get args from connect instruction */
if (guac_parser_expect(parser, socket, GUACD_USEC_TIMEOUT, "connect")) {
/* Log error */
guacd_log_handshake_failure();
guacd_log_guac_error(GUAC_LOG_DEBUG, "Error reading \"connect\"");
guac_parser_free(parser);
return 1;
}
/* Acknowledge connection availability */
guac_protocol_send_ready(socket, client->connection_id);
guac_socket_flush(socket);
/* Attempt join */
if (guac_client_add_user(client, user, parser->argc, parser->argv))
guacd_log(GUAC_LOG_ERROR, "User \"%s\" could NOT join connection \"%s\"", user->user_id, client->connection_id);
/* Begin user connection if join successful */
else {
guacd_log(GUAC_LOG_INFO, "User \"%s\" joined connection \"%s\" (%i users now present)",
user->user_id, client->connection_id, client->connected_users);
/* Handle user I/O, wait for connection to terminate */
guacd_user_start(parser, user);
/* Remove/free user */
guac_client_remove_user(client, user);
guacd_log(GUAC_LOG_INFO, "User \"%s\" disconnected (%i users remain)", user->user_id, client->connected_users);
}
/* Free mimetype lists */
guacd_free_mimetypes(audio_mimetypes);
guacd_free_mimetypes(video_mimetypes);
guacd_free_mimetypes(image_mimetypes);
guac_parser_free(parser);
/* Successful disconnect */
return 0;
}
/**
* Parameters for the user thread.
*/

113
src/guacd/user.c
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@ -1,113 +0,0 @@
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
#include "config.h"
#include "log.h"
#include "user.h"
#include <guacamole/client.h>
#include <guacamole/error.h>
#include <guacamole/parser.h>
#include <guacamole/protocol.h>
#include <guacamole/socket.h>
#include <guacamole/user.h>
#include <pthread.h>
#include <stdlib.h>
void* guacd_user_input_thread(void* data) {
guacd_user_input_thread_params* params = (guacd_user_input_thread_params*) data;
guac_user* user = params->user;
guac_parser* parser = params->parser;
guac_client* client = user->client;
guac_socket* socket = user->socket;
/* Guacamole user input loop */
while (client->state == GUAC_CLIENT_RUNNING && user->active) {
/* Read instruction, stop on error */
if (guac_parser_read(parser, socket, GUACD_USEC_TIMEOUT)) {
if (guac_error == GUAC_STATUS_TIMEOUT)
guac_user_abort(user, GUAC_PROTOCOL_STATUS_CLIENT_TIMEOUT, "User is not responding.");
else {
if (guac_error != GUAC_STATUS_CLOSED)
guacd_client_log_guac_error(client, GUAC_LOG_WARNING,
"Guacamole connection failure");
guac_user_stop(user);
}
return NULL;
}
/* Reset guac_error and guac_error_message (user/client handlers are not
* guaranteed to set these) */
guac_error = GUAC_STATUS_SUCCESS;
guac_error_message = NULL;
/* Call handler, stop on error */
if (guac_user_handle_instruction(user, parser->opcode, parser->argc, parser->argv) < 0) {
/* Log error */
guacd_client_log_guac_error(client, GUAC_LOG_WARNING,
"User connection aborted");
/* Log handler details */
guac_user_log(user, GUAC_LOG_DEBUG, "Failing instruction handler in user was \"%s\"", parser->opcode);
guac_user_stop(user);
return NULL;
}
}
return NULL;
}
int guacd_user_start(guac_parser* parser, guac_user* user) {
guacd_user_input_thread_params params = {
.parser = parser,
.user = user
};
pthread_t input_thread;
if (pthread_create(&input_thread, NULL, guacd_user_input_thread, (void*) &params)) {
guac_user_log(user, GUAC_LOG_ERROR, "Unable to start input thread");
guac_user_stop(user);
return -1;
}
/* Wait for I/O threads */
pthread_join(input_thread, NULL);
/* Explicitly signal disconnect */
guac_protocol_send_disconnect(user->socket);
guac_socket_flush(user->socket);
/* Done */
return 0;
}

50
src/libguacd/Makefile.am Normal file
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@ -0,0 +1,50 @@
#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
#
AUTOMAKE_OPTIONS = foreign
noinst_LTLIBRARIES = libguacd.la
noinst_HEADERS = \
libguacd/log.h \
libguacd/user.h
libguacd_la_SOURCES = \
log.c \
user.c
libguacd_la_CFLAGS = \
-Werror -Wall -pedantic \
@COMMON_INCLUDE@ \
@LIBGUAC_INCLUDE@
libguacd_la_LIBADD = \
@COMMON_LTLIB@ \
@LIBGUAC_LTLIB@
libguacd_la_LDFLAGS = \
@PTHREAD_LIBS@ \
@SSL_LIBS@
# SSL support
if ENABLE_SSL
noinst_HEADERS += libguacd/socket-ssl.h
libguacd_la_SOURCES += socket-ssl.c
endif

42
src/libguacd/libguacd/log.h Normal file
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@ -0,0 +1,42 @@
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
#ifndef LIBGUACD_LOG_H
#define LIBGUACD_LOG_H
#include "config.h"
#include <guacamole/client.h>
/**
* Prints an error message using the logging facilities of the given client,
* automatically including any information present in guac_error. This function
* accepts parameters identically to printf.
*/
void guacd_client_log_guac_error(guac_client* client,
guac_client_log_level level, const char* message);
/**
* Logs a reasonable explanatory message regarding handshake failure based on
* the current value of guac_error.
*/
void guacd_client_log_handshake_failure(guac_client* client);
#endif

0
src/guacd/socket-ssl.h → src/libguacd/libguacd/socket-ssl.h
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19
src/guacd/user.h → src/libguacd/libguacd/user.h
View File

@ -18,8 +18,8 @@
*/
#ifndef _GUACD_USER_H
#define _GUACD_USER_H
#ifndef LIBGUACD_USER_H
#define LIBGUACD_USER_H
#include "config.h"
@ -80,6 +80,21 @@ typedef struct guacd_user_input_thread_params {
*/
int guacd_user_start(guac_parser* parser, guac_user* user);
/**
* Handles the initial handshake of a user and all subsequent I/O. This
* function blocks until the user disconnects.
*
* @param user
* The user whose handshake and entire Guacamole protocol exchange should
* be handled.
*
* @return
* Zero if the user's Guacamole connection was successfully handled and
* the user has disconnected, or non-zero if an error prevented the user's
* connection from being handled properly.
*/
int guacd_handle_user(guac_user* user);
/**
* The thread which handles all user input, calling event handlers for received
* instructions.

72
src/libguacd/log.c Normal file
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@ -0,0 +1,72 @@
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
#include "config.h"
#include "libguacd/log.h"
#include <guacamole/client.h>
#include <guacamole/error.h>
#include <stdarg.h>
#include <stdio.h>
#include <syslog.h>
#include <unistd.h>
void guacd_client_log_guac_error(guac_client* client,
guac_client_log_level level, const char* message) {
if (guac_error != GUAC_STATUS_SUCCESS) {
/* If error message provided, include in log */
if (guac_error_message != NULL)
guac_client_log(client, level, "%s: %s",
message,
guac_error_message);
/* Otherwise just log with standard status string */
else
guac_client_log(client, level, "%s: %s",
message,
guac_status_string(guac_error));
}
/* Just log message if no status code */
else
guac_client_log(client, level, "%s", message);
}
void guacd_client_log_handshake_failure(guac_client* client) {
if (guac_error == GUAC_STATUS_CLOSED)
guac_client_log(client, GUAC_LOG_INFO,
"Guacamole connection closed during handshake");
else if (guac_error == GUAC_STATUS_PROTOCOL_ERROR)
guac_client_log(client, GUAC_LOG_ERROR,
"Guacamole protocol violation. Perhaps the version of "
"guacamole-client is incompatible with this version of "
"guacd?");
else
guac_client_log(client, GUAC_LOG_WARNING,
"Guacamole handshake failed: %s",
guac_status_string(guac_error));
}

2
src/guacd/socket-ssl.c → src/libguacd/socket-ssl.c
View File

@ -19,7 +19,7 @@
#include "config.h"
#include "socket-ssl.h"
#include "libguacd/socket-ssl.h"
#include <poll.h>
#include <stdlib.h>

321
src/libguacd/user.c Normal file
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@ -0,0 +1,321 @@
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
#include "config.h"
#include "libguacd/log.h"
#include "libguacd/user.h"
#include <guacamole/client.h>
#include <guacamole/error.h>
#include <guacamole/parser.h>
#include <guacamole/protocol.h>
#include <guacamole/socket.h>
#include <guacamole/user.h>
#include <pthread.h>
#include <stdlib.h>
#include <string.h>
/**
* Copies the given array of mimetypes (strings) into a newly-allocated NULL-
* terminated array of strings. Both the array and the strings within the array
* are newly-allocated and must be later freed via guacd_free_mimetypes().
*
* @param mimetypes
* The array of mimetypes to copy.
*
* @param count
* The number of mimetypes in the given array.
*
* @return
* A newly-allocated, NULL-terminated array containing newly-allocated
* copies of each of the mimetypes provided in the original mimetypes
* array.
*/
static char** guacd_copy_mimetypes(char** mimetypes, int count) {
int i;
/* Allocate sufficient space for NULL-terminated array of mimetypes */
char** mimetypes_copy = malloc(sizeof(char*) * (count+1));
/* Copy each provided mimetype */
for (i = 0; i < count; i++)
mimetypes_copy[i] = strdup(mimetypes[i]);
/* Terminate with NULL */
mimetypes_copy[count] = NULL;
return mimetypes_copy;
}
/**
* Frees the given array of mimetypes, including the space allocated to each
* mimetype string within the array. The provided array of mimetypes MUST have
* been allocated with guacd_copy_mimetypes().
*
* @param mimetypes
* The NULL-terminated array of mimetypes to free. This array MUST have
* been previously allocated with guacd_copy_mimetypes().
*/
static void guacd_free_mimetypes(char** mimetypes) {
char** current_mimetype = mimetypes;
/* Free all strings within NULL-terminated mimetype array */
while (*current_mimetype != NULL) {
free(*current_mimetype);
current_mimetype++;
}
/* Free the array itself, now that its contents have been freed */
free(mimetypes);
}
void* guacd_user_input_thread(void* data) {
guacd_user_input_thread_params* params = (guacd_user_input_thread_params*) data;
guac_user* user = params->user;
guac_parser* parser = params->parser;
guac_client* client = user->client;
guac_socket* socket = user->socket;
/* Guacamole user input loop */
while (client->state == GUAC_CLIENT_RUNNING && user->active) {
/* Read instruction, stop on error */
if (guac_parser_read(parser, socket, GUACD_USEC_TIMEOUT)) {
if (guac_error == GUAC_STATUS_TIMEOUT)
guac_user_abort(user, GUAC_PROTOCOL_STATUS_CLIENT_TIMEOUT, "User is not responding.");
else {
if (guac_error != GUAC_STATUS_CLOSED)
guacd_client_log_guac_error(client, GUAC_LOG_WARNING,
"Guacamole connection failure");
guac_user_stop(user);
}
return NULL;
}
/* Reset guac_error and guac_error_message (user/client handlers are not
* guaranteed to set these) */
guac_error = GUAC_STATUS_SUCCESS;
guac_error_message = NULL;
/* Call handler, stop on error */
if (guac_user_handle_instruction(user, parser->opcode, parser->argc, parser->argv) < 0) {
/* Log error */
guacd_client_log_guac_error(client, GUAC_LOG_WARNING,
"User connection aborted");
/* Log handler details */
guac_user_log(user, GUAC_LOG_DEBUG, "Failing instruction handler in user was \"%s\"", parser->opcode);
guac_user_stop(user);
return NULL;
}
}
return NULL;
}
int guacd_user_start(guac_parser* parser, guac_user* user) {
guacd_user_input_thread_params params = {
.parser = parser,
.user = user
};
pthread_t input_thread;
if (pthread_create(&input_thread, NULL, guacd_user_input_thread, (void*) &params)) {
guac_user_log(user, GUAC_LOG_ERROR, "Unable to start input thread");
guac_user_stop(user);
return -1;
}
/* Wait for I/O threads */
pthread_join(input_thread, NULL);
/* Explicitly signal disconnect */
guac_protocol_send_disconnect(user->socket);
guac_socket_flush(user->socket);
/* Done */
return 0;
}
int guacd_handle_user(guac_user* user) {
guac_socket* socket = user->socket;
guac_client* client = user->client;
/* Send args */
if (guac_protocol_send_args(socket, client->args)
|| guac_socket_flush(socket)) {
/* Log error */
guacd_client_log_handshake_failure(client);
guacd_client_log_guac_error(client, GUAC_LOG_DEBUG,
"Error sending \"args\" to new user");
return 1;
}
guac_parser* parser = guac_parser_alloc();
/* Get optimal screen size */
if (guac_parser_expect(parser, socket, GUACD_USEC_TIMEOUT, "size")) {
/* Log error */
guacd_client_log_handshake_failure(client);
guacd_client_log_guac_error(client, GUAC_LOG_DEBUG,
"Error reading \"size\"");
guac_parser_free(parser);
return 1;
}
/* Validate content of size instruction */
if (parser->argc < 2) {
guac_client_log(client, GUAC_LOG_ERROR, "Received \"size\" "
"instruction lacked required arguments.");
guac_parser_free(parser);
return 1;
}
/* Parse optimal screen dimensions from size instruction */
user->info.optimal_width = atoi(parser->argv[0]);
user->info.optimal_height = atoi(parser->argv[1]);
/* If DPI given, set the client resolution */
if (parser->argc >= 3)
user->info.optimal_resolution = atoi(parser->argv[2]);
/* Otherwise, use a safe default for rough backwards compatibility */
else
user->info.optimal_resolution = 96;
/* Get supported audio formats */
if (guac_parser_expect(parser, socket, GUACD_USEC_TIMEOUT, "audio")) {
/* Log error */
guacd_client_log_handshake_failure(client);
guacd_client_log_guac_error(client, GUAC_LOG_DEBUG,
"Error reading \"audio\"");
guac_parser_free(parser);
return 1;
}
/* Store audio mimetypes */
char** audio_mimetypes = guacd_copy_mimetypes(parser->argv, parser->argc);
user->info.audio_mimetypes = (const char**) audio_mimetypes;
/* Get supported video formats */
if (guac_parser_expect(parser, socket, GUACD_USEC_TIMEOUT, "video")) {
/* Log error */
guacd_client_log_handshake_failure(client);
guacd_client_log_guac_error(client, GUAC_LOG_DEBUG,
"Error reading \"video\"");
guac_parser_free(parser);
return 1;
}
/* Store video mimetypes */
char** video_mimetypes = guacd_copy_mimetypes(parser->argv, parser->argc);
user->info.video_mimetypes = (const char**) video_mimetypes;
/* Get supported image formats */
if (guac_parser_expect(parser, socket, GUACD_USEC_TIMEOUT, "image")) {
/* Log error */
guacd_client_log_handshake_failure(client);
guacd_client_log_guac_error(client, GUAC_LOG_DEBUG,
"Error reading \"image\"");
guac_parser_free(parser);
return 1;
}
/* Store image mimetypes */
char** image_mimetypes = guacd_copy_mimetypes(parser->argv, parser->argc);
user->info.image_mimetypes = (const char**) image_mimetypes;
/* Get args from connect instruction */
if (guac_parser_expect(parser, socket, GUACD_USEC_TIMEOUT, "connect")) {
/* Log error */
guacd_client_log_handshake_failure(client);
guacd_client_log_guac_error(client, GUAC_LOG_DEBUG,
"Error reading \"connect\"");
guac_parser_free(parser);
return 1;
}
/* Acknowledge connection availability */
guac_protocol_send_ready(socket, client->connection_id);
guac_socket_flush(socket);
/* Attempt join */
if (guac_client_add_user(client, user, parser->argc, parser->argv))
guac_client_log(client, GUAC_LOG_ERROR, "User \"%s\" could NOT "
"join connection \"%s\"", user->user_id, client->connection_id);
/* Begin user connection if join successful */
else {
guac_client_log(client, GUAC_LOG_INFO, "User \"%s\" joined connection "
"\"%s\" (%i users now present)", user->user_id,
client->connection_id, client->connected_users);
/* Handle user I/O, wait for connection to terminate */
guacd_user_start(parser, user);
/* Remove/free user */
guac_client_remove_user(client, user);
guac_client_log(client, GUAC_LOG_INFO, "User \"%s\" disconnected (%i "
"users remain)", user->user_id, client->connected_users);
}
/* Free mimetype lists */
guacd_free_mimetypes(audio_mimetypes);
guacd_free_mimetypes(video_mimetypes);
guacd_free_mimetypes(image_mimetypes);
guac_parser_free(parser);
/* Successful disconnect */
return 0;
}